Section 312(2) in Chennai City Municipal Corporation Act, 1919
(2)If the commissioner or any person so authorized by him has reason to believe that in any place any animal intended for human food is being slaughtered or any carcass is being skinned or cut up or that any food is being manufactured, stored, prepared, packed, cleansed, kept or exposed for sale, or sold without, or otherwise than in conformity with a licence, he may enter any such place without notice at any time by day or night for the purpose of satisfying himself whether any provision of law, by-laws, or regulations or any condition of licence is being contravened.